Sewing thread



L COHEN SEWING THREAD prii QJ, E932.

Filed Aug. 2, 1929 Patented Apr. 19,v 1932V srrrs Prem? voli-Fics ISSAKHAR COHEN',v 0F NEW YORK., N'. Y., ASSIGNOR T0 SALVATORE BONAN, OF NEW YORK, N. Y., A COPARTNERSHIP CONSISTING- F SALVATORE BONAN AND ISSAKHAR REN SEWING 'rennen application mea August e, i929. serial No. 383,092.

g@ to my invention.

An object of the invention is to provide a thread which is not subject to rotA or deterioration, yet which is inherently resilient to stretch with a resilient fabric through i@ which it is sewed, or of which it is a component part.

Another object is to provide a'thread of this ,character offering a strong frictional.

resistance to slippage at the thread holes so that when a plurality of laminations ofresilient fabric are sewedtogether and subjected to Lcommon stretching strains, the portions of the thread betweenthe thread holes will stretch but there will be no creeping. of the laminations relatively to each other..

Another objectis to provide an article of resilient fabric sewed with'a thread of a resiliency atleast as great as that of the fabric-V and acting to prevent rupture at the seamor thread-line when stretching strains are imposed on the fabric, the fabric article sewed with the thread being'wholly devoid of :Happing ends 'of thread likely to be snagged and being readily Washable wit-hout injury to the thread.

In accordance withl a preferred embodiment of the invention, the threadis formed of a plurality of fibrous strands knitted together to Vform 'a fairly compact bundle-or bunch of interlocking chains of thread loops containing sufiicient slack to render the thread highly resilient, being sutliciently rough surfaced to oppose a strong frictional drag at the thread holes, yet being transversely compressible so that it will yield when stitched and. pulled through a relatively small needleproduced opening and will not cut the fabric.

rllhe thread may be used in sewing resilient fabric articles of many varieties and regardless of whether the fabric be knitted, netted For illustrative purposes, I have shown the thread used in the construction of a necktle of the unlined, multifold type formed of heavy woven fabric, cut on the bias and held in folded position by a single line of my improved thread. The thread being firmly anchored at its ends, will not snag on a shirt but-ton and, due to its high resiliency, 'will' stretch with the tie as the latter is pulled or knotted or slipped through a turn-over collar.

My novel thread onstrand -inay also be, used as the warp strand, the weft-strand or both warp and weft strands `of vnovel Woven fabric devoid of rubber or other inherently resilient element,which fabric is yet resilient longitudinally, transversely or both.

The invention may bemore fully understood in connection'with the accompanying drawings, wherein Fig. l is a greatly enlarged perspective l view of a length of my improved thread orstrand.

Fig. 2 is a similar view and showing the thread when distended by a longitudinal pull thereon.

Fig. 3 is a brokenplan view of a necktie in vwhich a single line of stitching by my improved thread lserves as the sole securing ,means to retain the tie in its properly folded condition, the tie being shownbefore the stitching is complete and with the needle hanging on theend of the thread.

Fig. 4c is an enlarged transverse sectional view on the line 4 4 of Fig. 3, and

Fig. 5 is a broken longitudinal sectional 'view somewhat diagrammatic in form and on a further enlarged scale taken approximately on the line 5-5 of Fig. 3.

resilient thread vin its normal unstretched condition, and in Fig. 2 l have shown the condition of the thread when under tension. Both of these views are greatly exaggerated 1n size. bodiment comprises four strands interlocking with each other to produce/what approximates four lines of chain knitting with each In Fig. 1 of the drawings I have shown' one embodiment of the knitted inherently The thread in the illustrated. em\

line interlocked with at least two of the other lines and with the strands so knitted together that they form a fairly compact bundle or bunch of interlocking chains of strand loops. This thread, when transversely severed at any point, will show vat least eight strands in cross section so that'it will be apparent that considerable doubling or looping back of the strands is resorted to in order to'provide the excess'needed for substantial elasticity. This thread is generally rectangular in cross section, its surface is rendered rough by the multiplicity of loops or reentrant` and it is bulky enough compared to its density to be transversely compressed.

Fig. 2 is shown in a slightly exaggerated scale, the manner in 'which 4the various strands of the thread and the various loops of the strands position themselves, when a stretching strain occurs on the thread. The illustrated four-strand thread may be stretched to approximately one and a quarter times its normal length without exceeding its elastic limit. A. thread with more or with less strands can be made within the scope of my invention, but for most purposes the thread disclosed would be preferred.

While special machinery may be desired for-producing this thread, it may be formed as the product of an ordinary knittingmachine. in leffect it constitutes a knitted fabric of width substantially no greater than its thickness. l f.

In Figs. 3 to 5 inclusive, I have shown the manner in which the thread may be used in sewing a four-in-hand necktie. The tie illustrated is, except for the thread, of entirely conventional construction and is of the unlined multifold type relying 'forsubstunce and body on 'the quality of fabric which is employed and the number of times that the fabric is folded upon itself rather than on the use of lining material.

'llhis tie includes the 'usual narrow neckencircling portion 15 and the folded over,

flaring tying ends 16. Each tying/end is formed by `folding back the edge portions of the necktie material upon themselves. As cest seeninFig. 4, each of therearwardly turned aps at the tie ends are folded upon themselves several times, giving considerable bod'y and substance to the tie and the edges of the a s are folded over each other through su stantially their entire length and secured together by .a single line of stitching 17.

The ti'e body is preferably of bias cut, woven fabric rendering it resilient in a longitudinal direction, so that it is substantially self-sustainin against permanent deformation under en wise pulling strains incidental to knotting the tie or slipping it through a collar. The line of stitching 17, however, when formed by my improved thread is at least as resllient as the tie body itself. The

stitching isl preferably hand sewn and the two e'nds of the thread are firmly and permanently anchored at 18, as by lmotting or otherwise at both ends so that there are no free or flappingthread ends.

It will be noted from Figs. 1 and 2 that the 'thread is of somewhat irregular polygonal shape (generally iat rectangular) in cross section opposing some frictional resistanceto slippage through the thread holes so that when the tie body is pulled the thread, instead of slipping through the holes, will stretch with the tie body between the holes and strongly resist any relative creeping of the various laminations, which might cause the tie to rumple or bulge. When the tie body is released, the tie and thread spring back to their normal position, the thread' serving as a supplemental positive returning force to restore the tie to its normal shape.

It will be apparent that many articles of manufacture formed of resilient fabric might be advantageously sewed with the thread. For instance, seams connecting-the edges of resilient fabric sections will not rupture under normal strains when sewed with my thread. For ordinary curtain fabrics the `hem may advantageously be sewed with this type of thread. The lining of an ordinary necktie may be sewed in'place with it, and a large variety of woven, knitted or netted fabric articles may have their durability and resistance tojpermanent deform-l ing strains materially enhanced by judicious use of the thread. It will be obvious that in practically all` of the'se articles the line of sitching will generally parallel the direction of resiliency ofthe fabric. In the bias cut, woven fabric of thenecktie the lows the bias cut, whereas with a uniformly resilient knitted fabric the thread might run in any direction. used in connection with cut hosiery a line of stitching about the top of the hose may be employed to allow for circumferential exthread fol- When the device is v pansion of the hose top, assuring a sung lfit and preventing either permanent stretching or undue bindingjat this'point, andsimilar relations apply to hat linings.

A plurality of parallel strands'of my knitted thread may serve as en fabric, used, for instance, for belts, and aEording resilience somewhat analagous to that of rubber or 'rubberized fabric but far less liable to deterioration under the effect of perspiration and in washing. Such 'composite woven fabric of knitted strands the warp 4for a wov- 1 garment may also be produced with my threads or` strands inboth the warp and weft, and with resiliency accordingly in both directions.

It will ,thus be seen that there is herein described an article in which the several features of this invention are embodied, and which article in its action attains the various v be interpreted as illustrative and notv in a objects of the invention and is well suited to meet the requirements of practical use. As many changes could be made in the above construction, and many apparently 5 widely different embodiments of this invention could be made without departing from v the scope thereof, it is intended that all matter contained in the above description or j shown in the accompanying drawings shall limiting sense.

Having thus described my invention, what claim as new and desire to secure by Letters Patent is 1. As a new article of manufacture, a washable knitted brous sewing thread comprisingseveral inter-knitted strands, said thread f being sufficiently longitudinally resilient to permit stretching thereof to Aan' extent approximating one andNone-quartervtimes its normal length, said'thread being transversef ly compressible and havinga rough surface resistant to slippage at the lthread holes.

2. A knitted elastic sewing thread capable of being stretched to approximately one and one-quarter times its normal length without p exceeding its elastic limit, said thread including a plurality of fibrous strands knitted to each other to provide a plurality of-inf terlocked cha-insnof strand loops, said chains forming a unitary transversely compressible lon itudinally resilient compact thread. igned at New York in the county of Newl York and State of New York this 31st day of 35'Ju1y, 1929. l

y I'SSAKHAR COHEN. 

